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2005

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Articles 3151 - 3180 of 3257

Full-Text Articles in Life Sciences

Econometric Modeling Of Turkey's Hazelnut Sector: Implications On Recent Policies*, Fahri̇ Yavuz, Avni̇ Bi̇ri̇nci̇, Kenan Peker, Tecer Atsan Jan 2005

Econometric Modeling Of Turkey's Hazelnut Sector: Implications On Recent Policies*, Fahri̇ Yavuz, Avni̇ Bi̇ri̇nci̇, Kenan Peker, Tecer Atsan

Turkish Journal of Agriculture and Forestry

The hazelnut is an important product in Turkey's economy as it is an important source of income for a large number of family farms and makes up around 75% of world production and 20% of total agricultural exports from Turkey. Hazelnut production has increased in recent years along with high levels of storage and expansion of planted areas from traditional steep lands to flat lands, where alternative cropping is possible. The aim of this study was to determine the major causes of these problems using an econometric model of Turkey's hazelnut sector. Estimation results of the model comply with economic …

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Effects Of Minimum And Conventional Tillage Systems On Soil Properties And Yield Of Winter Wheat (Triticum Aestivum L.) In Clay-Loam In The Çanakkale Region, Saki̇ne Özpinar, Anil Çay Jan 2005

Effects Of Minimum And Conventional Tillage Systems On Soil Properties And Yield Of Winter Wheat (Triticum Aestivum L.) In Clay-Loam In The Çanakkale Region, Saki̇ne Özpinar, Anil Çay

Turkish Journal of Agriculture and Forestry

The experiment was conducted during the 2001-2003 cropping period to evaluate the effects of 3 tillage systems, conventional tillage (CT), and minimum tillage with rototiller (MTR) and disc (MTD), on the soil properties and wheat yield (Triticum aestivum L.). Based on 2-year results, soil bulk density at 0-10 cm in the growing period in MTR, CT and MTD was 1.20, 1.34 and 1.24 Mg m^{-3} respectively. Corresponding values at 10-20 and 20-30 cm were 1.26, 1.29 and 1.21 Mg m^{-3} and 1.30, 1.27 and 1.40 Mg m^{-3} respectively. Aggregate size distribution and mean weight diameter throughout the 2 years of …

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Using Advanced Spectral Analyses Techniques As Possible Means Of Identifying Clay Minerals, Ünal Altinbaş, Yusuf Kurucu, Mustafa Bolca, A. H. El-Nahry Jan 2005

Using Advanced Spectral Analyses Techniques As Possible Means Of Identifying Clay Minerals, Ünal Altinbaş, Yusuf Kurucu, Mustafa Bolca, A. H. El-Nahry

Turkish Journal of Agriculture and Forestry

Spectral analyses, one of the most advanced remote sensing techniques, were used as a possible means of identifying the mineralogy of the clay fractions that corresponded to the Küçük Menderes Plain, south of İzmir, Turkey. Different spectral processes were used to execute the prospective spectral analyses. The processes include: i. the reflectance calibration of TM images belonging to the studied area, ii. using minimum noise fraction (MNF) transformation and iii. creating the pixel purity index (PPI), which was used to the most "spectrally pure", extreme, pixel in multi-spectral images. Spectral analyses of the clay mineralogy of the studied area were …

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Clay Minerals, Ca/Mg Ratio And Fe-Al-Oxides In Relation To Structural Stability, Hydraulic Conductivity And Soil Erosion In Southeastern Turkey, Kadi̇r Yilmaz, İsmai̇l Çeli̇k, Seli̇m Kapur, John Ryan Jan 2005

Clay Minerals, Ca/Mg Ratio And Fe-Al-Oxides In Relation To Structural Stability, Hydraulic Conductivity And Soil Erosion In Southeastern Turkey, Kadi̇r Yilmaz, İsmai̇l Çeli̇k, Seli̇m Kapur, John Ryan

Turkish Journal of Agriculture and Forestry

Studies of clay mineralogy and related chemical composition are rarely connected with implications for soil management in the field. However, this study attempts to manifest the practical utilization of analytical data for determining the susceptibility to soil erosion. The data obtained involve the determination of clay mineral properties, calcium/magnesium ratios, and free aluminum (Al) and iron (Fe) oxides on structure stability, and hydraulic conductivity properties. Nine representative soil pedons developed on serpentine, limestone, and basalt parent materials were selected for the study. The soils were initially grouped into 3 according to their structural stability values. Group 1 soils had the …

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Interactive Effect Of Nitrogen And Boron On Cotton Yield And Fiber Quality, Özgül Görmüş Jan 2005

Interactive Effect Of Nitrogen And Boron On Cotton Yield And Fiber Quality, Özgül Görmüş

Turkish Journal of Agriculture and Forestry

This study aimed to determine the effect of application rates of N and B on cotton yield and fiber quality. Suregrow 125 (Gossypium hirsutum L.) was grown on a clay soil having an average 0.38 mg kg^{-1} B concentration. Analysis of leaf tissue taken at early bloom and before the nutrient application indicated that N and B concentrations were sufficient. Nitrogen was applied to the soil at rates of 0, 80 and 160 kg ha^{-1}, and B was applied to the foliage 3 times for totals of 0, 0.56 and 1.12 kg B ha^{-1}. Foliar-applied B significantly increased leaf blade …

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Determining Some Yield And Quality Characteristics Of Mutants Induced From A Durum Wheat (Triticum Durum Desf.) Cultivar, Mehmet Ali̇ Saki̇n, Ahmet Yildirim, Sabri̇ Gökmen Jan 2005

Determining Some Yield And Quality Characteristics Of Mutants Induced From A Durum Wheat (Triticum Durum Desf.) Cultivar, Mehmet Ali̇ Saki̇n, Ahmet Yildirim, Sabri̇ Gökmen

Turkish Journal of Agriculture and Forestry

Mutation breeding is one of the breeding methods used successfully in durum wheat for selecting lines with increased agronomic values. The aim of this study was to select mutant lines having a better agronomic potential than the mother variety Gediz-75 in the M_6 and M_7 generations. The mutants were derived from the variety Gediz-75 of durum wheat (Triticum durum Desf.). The seeds were either irradiated with gamma rays at Cobalt 60 (^{60}Co) or treated with ethyl-methane-sulfonate (EMS). Eighteen selected mutants and the mother variety Gediz-75 were examined in the M_6 and M_7 generations for yield and quality characteristics. The experiments …

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An Investigation On The Establishment Of Artificial Pasture Under Ankara's Ecological Conditions*, Sebahatti̇n Albayrak, Hayretti̇n Eki̇z Jan 2005

An Investigation On The Establishment Of Artificial Pasture Under Ankara's Ecological Conditions*, Sebahatti̇n Albayrak, Hayretti̇n Eki̇z

Turkish Journal of Agriculture and Forestry

This study was conducted to determine suitable perennial forage species and their mixtures for the establishment of short-term artificial pastures under dry conditions in Ankara between 2000 and 2002. Alfalfa (Medicago sativa L.), sainfoin (Onobrychis sativa Lam.), smooth brome (Bromus inermis Leys.), crested wheatgrass (Agropyron cristatum (L.) Gaertn.) and their binary and complex mixtures were used. The research was carried out in a randomized block design with 4 replicates. The results showed significant differences among the botanical composition ratio in mixtures. The highest green, hay and dry matter yield were obtained from alfalfa + smooth brome mixtures (16.05 t ha^{-1}, …

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Palynological Study On The Pollen Grains Of Selected Turkish Grape (Vitis Vinifera L.) Cultivars, Bi̇rhan Marasali, Münevver Pinar, H. Nurhan Büyükkartal Jan 2005

Palynological Study On The Pollen Grains Of Selected Turkish Grape (Vitis Vinifera L.) Cultivars, Bi̇rhan Marasali, Münevver Pinar, H. Nurhan Büyükkartal

Turkish Journal of Agriculture and Forestry

The pollen morphology and ultrastructure of selected Turkish indigenous grape cultivars and newly released hybrid varieties were examined by light microscopy and scanning electron microscopy. The pollen differed in some microstructural parameters. The size of the pollen grains ranged from 19.0 x 22.4 µm in Beyaz Çavuş to 24.3 x 21.0 µm in Siyah Gemre. Hönüsü cultivar showed significant variations in the sizes of the polar and equatorial axes. The greatest colpus size was measured in Siyah Gemre (18.4 µm) and the longest pore size was observed in Ata sarısı (28 µm). The exine thickness of the pollen grains ranged …

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Cambial Isoperoxidases Related To Graft Compatibility In Pear-Quince Graft Combinations, Hati̇ce Gülen, Menşure Çeli̇k, Mehmet Polat, Ati̇lla Eri̇ş Jan 2005

Cambial Isoperoxidases Related To Graft Compatibility In Pear-Quince Graft Combinations, Hati̇ce Gülen, Menşure Çeli̇k, Mehmet Polat, Ati̇lla Eri̇ş

Turkish Journal of Agriculture and Forestry

This study was initiated to survey the graft compatibility characteristics of some selected quince clones known as "S.Ö." with regard to isoperoxidase markers. Compatible (Beurre Hardy = BH) and incompatible (Bartlett = BT) pear cultivars were grafted on quince A (QA) and 13 S.Ö. quince clones by T budding. Bark tissues were collected from the union (4, 8 and 12 weeks after grafting) and from unbudded rootstocks in addition to current-year shoots of 2 pear scions to investigate 2 anodal isoperoxidase bands. Isoperoxidase profiles of the samples were visualized by native polyacrylamide gel electrophoresis and no marked difference was detected …

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Controlling Foliar Blight Of Wheat In South Asia: A Holistic Approach, Etienne Duveiller, R. C. Sharma, D. Mercado, H. Maraite, M. R. Bhatta, G. Ortiz-Ferrara, D. Sharma Jan 2005

Controlling Foliar Blight Of Wheat In South Asia: A Holistic Approach, Etienne Duveiller, R. C. Sharma, D. Mercado, H. Maraite, M. R. Bhatta, G. Ortiz-Ferrara, D. Sharma

Turkish Journal of Agriculture and Forestry

Foliar blight is a major biotic constraint to wheat in the Gangetic plains of south Asia, particularly in the rice-wheat system. The disease occurs as a complex of spot blotch and tan spot caused by C. sativus and P. tritici-repentis, respectively. Yield losses reach on average 15% but are variable depending on sowing time, years, locations and stress conditions. Resistance breeding has been the cornerstone of the control strategy. Through international agricultural research efforts in collaboration with National Agricultural Research Systems (NARS), resistance sources from China, Zambia and Brazil were identified and novel germplasm such as synthetic hexaploid wheats derived …

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International Cooperation For Winter Wheat Improvement In Central Asia: Results And Perspectives, Alexei I. Morgounov, H.-J. Braun, H. Ketata, R. Paroda Jan 2005

International Cooperation For Winter Wheat Improvement In Central Asia: Results And Perspectives, Alexei I. Morgounov, H.-J. Braun, H. Ketata, R. Paroda

Turkish Journal of Agriculture and Forestry

Crop production in Central Asia has long history going back to 2000-3000 years BC. The farming in the past was mainly concentrated in irrigated areas along the two main river basins: AmuDarya and Syr-Darya. Wheat cultivation in Central Asia in the 20th century concentrated primarily in rainfed area. The breeding work conducted at several stations in the region was initially based on local landraces and resulted in adapted varieties. However, the breeding work was not consistent and interrupted. Since 1991 the wheat became an important crop due to food security concern and replaced cotton in some areas. The modern varieties …

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Avenacin A-1 Content Of Some Local Oat Genotypes And The In Vitro Effect Of Avenacins On Several Soil-Borne Fungal Pathogens Of Cereals, Fi̇gen Mert Türk, Cem Ö. Egesel, M. Kemal Gül Jan 2005

Avenacin A-1 Content Of Some Local Oat Genotypes And The In Vitro Effect Of Avenacins On Several Soil-Borne Fungal Pathogens Of Cereals, Fi̇gen Mert Türk, Cem Ö. Egesel, M. Kemal Gül

Turkish Journal of Agriculture and Forestry

Avenacins are a mixture of 4 major (avenacin A-1, B-1, A-2 and B-2) autofluorescent compounds that are accumulated in the roots of oats (Avena spp.), especially root tips, and that have antimicrobial properties. In this research, we screened 189 genotypes of the family Gramineae for autofluorescence and also quantified 35 Avena genotypes for avenacin A-1 content, which is the most abundant and toxic avenacin type. Screening under UV transillumination proved that none of the species, except for Avena spp. accumulated avenacins in their roots. We aimed to find a genotype that lacks avenacin A-1 in order to investigate fungus-oat interaction …

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Response To Some Acaricides Of The Two-Spotted Spider Mite (Tetranychus Urticae Koch) From Protected Vegetables In Isparta, Recep Ay, Elvan Sökeli̇, İsmai̇l Karaca, M. Oktay Gürkan Jan 2005

Response To Some Acaricides Of The Two-Spotted Spider Mite (Tetranychus Urticae Koch) From Protected Vegetables In Isparta, Recep Ay, Elvan Sökeli̇, İsmai̇l Karaca, M. Oktay Gürkan

Turkish Journal of Agriculture and Forestry

The two-spotted spider mite, Tetranychus urticae Koch, was tested for susceptibility to various acaricides, propargite (Omite) 570 g l^{-1}, amitraz (Kortraz) 200 g l^{-1} and abamectin (Agrimec) 18 g l^{-1}. Propargite, a selective acaricide, has been used to control T. urticae in many crops in Turkey. Amitraz and abamectin have acaricidal and insecticidal properties, and are thus used to control spider mites and some vegetable pests (e.g., whiteflies and Liriomyza spp.). Five different T. urticae populations collected from vegetable greenhouses in Isparta and their responses to those acaricides were investigated by leaf dip assay and compared with those of a …

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Influence Of Seed Development And Seed Position On Oil, Fatty Acids And Total Tocopherol Contents In Sunflower (Helianthus Annuus L.), Hasan Baydar, Sabri̇ Erbaş Jan 2005

Influence Of Seed Development And Seed Position On Oil, Fatty Acids And Total Tocopherol Contents In Sunflower (Helianthus Annuus L.), Hasan Baydar, Sabri̇ Erbaş

Turkish Journal of Agriculture and Forestry

Sunflower (Helianthus annuus L.) is one of the most important oil crops in the world due to its excellent oil quality. This research was conducted to evaluate changes in the contents of oil, fatty acids and total tocopherol of sunflower seeds obtained from different maturity stages and positions on the head. The heads were harvested sequentially 10, 15, 20, 25, 30, 35, 40, and 45 days after flowering (DAF) in 2002 and 2003. The oil content of sunflower seeds increased significantly with seed development, reaching a maximum value of 45.8% at 35 DAF in 2002 and 47.9% at 30 DAF …

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Effects Of Explant Types And Different Concentrations Of Sucrose And Phytoharmones On Plant Regeneration And Hypericin Content In Hypericum Perforatum L., Ali̇ Kemal Ayan, Cüneyt Çirak, Kudret Kevseroğlu, Atalay Sökmen Jan 2005

Effects Of Explant Types And Different Concentrations Of Sucrose And Phytoharmones On Plant Regeneration And Hypericin Content In Hypericum Perforatum L., Ali̇ Kemal Ayan, Cüneyt Çirak, Kudret Kevseroğlu, Atalay Sökmen

Turkish Journal of Agriculture and Forestry

Hypericum perforatum L. is a medicinal perennial known as "St. John's wort" in Western Europe and used in the treatment of mild to moderate depression. Hypericin, a dianthrone red pigment, is considered responsible for reversing the depression symptoms. The goal of this study was to produce this pigment via micropropagation and thereby describe a suitable micropropagation method for this plant. To achieve this objective, leaf discs and stem segments were cultured on Murashige and Skoog (MS) medium supplemented with kinetin and 2,4-dichlorophenoxyacetic acid (0.5, 1 and 1.5 mg l^{-1}) and sucrose concentrations (30, 40 and 50 g l^{-1}) in darkness …

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Changes In Endogenous Hormone Levels During The Ripening Of Grape Cultivars Having Different Berry Set Mechanisms, Ni̇lgün Göktürk Baydar, Ni̇hat Harmankaya Jan 2005

Changes In Endogenous Hormone Levels During The Ripening Of Grape Cultivars Having Different Berry Set Mechanisms, Ni̇lgün Göktürk Baydar, Ni̇hat Harmankaya

Turkish Journal of Agriculture and Forestry

Concentrations of indole-3-acetic acid (IAA), gibberellic acid (GA_3) and abscisic acid (ABA) were measured by gas chromatography (GC) in the berries of 3 grape cultivars having different berry set mechanisms to elucidate the possible relationship between endogenous hormones and berry set mechanisms. The results obtained showed that the levels of IAA, GA_3 and ABA in seeded Italia, empty seeded Çavuş and stenospermocarpic seedless Perlette changed during ripening. While Italia exhibited a hormonal pattern similar to that of Çavuş, Perlette showed a different IAA and ABA pattern compared to the other cultivars. Generally, IAA and GA_3 were high in the early …

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Development Of A Method For Priority Setting In Forestry Research Projects In Turkey, İsmet Daşdemi̇r Jan 2005

Development Of A Method For Priority Setting In Forestry Research Projects In Turkey, İsmet Daşdemi̇r

Turkish Journal of Agriculture and Forestry

This paper deals with the priority-setting problem in public research projects in the Turkish forestry sector. For this aim, a combined method has been developed, that is scientific, objective, dynamic, consistent, multidimensional, easily applicable and understandable. The theoretical framework, peculiarities and criteria of the method and weighting of the criteria are explained. Assuring hierarchical multidimensional consistency between the purposes and priorities in the national and sectoral plans with the priorities of forestry research projects was followed for selecting the criteria and weighting them. This method was suggested to the Ministry of Environment and Forestry and its application was implemented through …

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Effects Of Some Soil Properties On The Growth Of Hybrid Poplar In The Terme-Gölardı Region Of Turkey, Aydin Tüfekçi̇oğlu, Lokman Altun, H. Zeki̇ Kalay, Murat Yilmaz Jan 2005

Effects Of Some Soil Properties On The Growth Of Hybrid Poplar In The Terme-Gölardı Region Of Turkey, Aydin Tüfekçi̇oğlu, Lokman Altun, H. Zeki̇ Kalay, Murat Yilmaz

Turkish Journal of Agriculture and Forestry

In this study, the effects of some physical and chemical soil properties on the growth of hybrid poplar were investigated in the Terme-Gölardı region where a poor growth of trees was observed. Soil samples were taken from both poor and good growth areas. Chemical soil properties such as pH, exchangeable Na^+, K^+, Ca^{++} and Mg^{++} content, CEC, phosphorus content and salinity were determined. Physical soil properties such as field capacity, permanent wilting point, water holding capacity and available water were measured. Ground water depth was measured in the field during soil sampling. Clay and Mg++ content and pH of the …

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Effects Of Mimosa Bark Usage On Some Properties Of Particleboard, Gökay Nemli̇, Gürsel Çolakoğlu Jan 2005

Effects Of Mimosa Bark Usage On Some Properties Of Particleboard, Gökay Nemli̇, Gürsel Çolakoğlu

Turkish Journal of Agriculture and Forestry

The objective of this study was to determine the effect of mimosa bark usage on the formaldehyde emission, physical and mechanical properties of particleboard. Fifteen panels from black locust (Robinia pseudoacacia L.) wood containing mimosa bark in a core layer at different ratios were manufactured. Three boards without bark addition were produced as control boards. Formaldehyde emission, modulus of rupture, modulus of elasticity, internal bond strength and thickness swelling of the specimens were tested. It was found that panels made from black locust wood had the highest mechanical properties while panels containing mimosa bark had the lowest. Bark usage significantly …

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Comparison Of Parameter Estimation Methods For The Three-Parameter Generalized Pareto Distribution, Teki̇n Özteki̇n Jan 2005

Comparison Of Parameter Estimation Methods For The Three-Parameter Generalized Pareto Distribution, Teki̇n Özteki̇n

Turkish Journal of Agriculture and Forestry

The generalized Pareto distribution, which is a special case of both exponential and Wakeby distribution, has good potential for the analysis of flood peaks because of its inherent properties. In this paper, the parameter estimation methods of the moments, probability-weighted moments, maximum likelihood, principle of maximum entropy, and least squares to estimate the parameters in the three-parameter generalized Pareto distribution are compared. The usefulness and applicability of each method is discussed by application to observed annual discharge data for 50 different rivers, most of them in Turkey. The comparisons are based on the ability of each method to predict the …

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Comparison Of Decomposition Rates Of Beech (Fagus Orientalis Lipsky) And Spruce (Picea Orientalis (L.) Link) Litter In Pure And Mixed Stands Of Both Species In Artvin, Turkey, Temel Sariyildiz, Aydin Tüfekçi̇oğlu, Mehmet Küçük Jan 2005

Comparison Of Decomposition Rates Of Beech (Fagus Orientalis Lipsky) And Spruce (Picea Orientalis (L.) Link) Litter In Pure And Mixed Stands Of Both Species In Artvin, Turkey, Temel Sariyildiz, Aydin Tüfekçi̇oğlu, Mehmet Küçük

Turkish Journal of Agriculture and Forestry

The decomposition of spruce, beech and mixed litters of spruce and beech was investigated over 3.5 years in beech, spruce and mixed (beech/spruce) stands using less than 1.5 mm mesh litter bags. Initially, carbon, nitrogen, lignin and cellulose concentrations, and C:N and lignin:N ratios were determined in beech and spruce litters. For all sampling intervals, mixed litters showed higher decay rates than individual beech and spruce litters in both pure stands and mixed stands. Spruce decomposed more rapidly than beech, and initial lignin concentration explained most of the variation in decomposition rates between beech and spruce. However, differences in decomposition …

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Soil Erosion Risk Assessment Of The Gölbaşı Environmental Protection Area And Its Vicinity Using The Corine Model, Orhan Dengi̇z, Suat Akgül Jan 2005

Soil Erosion Risk Assessment Of The Gölbaşı Environmental Protection Area And Its Vicinity Using The Corine Model, Orhan Dengi̇z, Suat Akgül

Turkish Journal of Agriculture and Forestry

The main objective of this study was to determine the soil erosion risk in Gölbaşı Environmental Protection Area and its vicinity using the CORINE model. The model consists of 6 steps, each of which using different overlaying combinations of soil texture, depth, stoniness, climatic data, land use and land cover information. In the first step, soil texture, depth and stoniness layers were extracted from a 1:25,000 scaled digital soil map and overlaid to form a soil erodibility map. Secondly Fournier and Bagnouls-Gaussen aridity indexes calculated from the climatic data were used to form the erosivity layer of the study area. …

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A New Method For The Detection Of Minor Populations Of Citrus Tristeza Virus Strains Infecting Single Citrus Trees, Hani̇fe Genç Jan 2005

A New Method For The Detection Of Minor Populations Of Citrus Tristeza Virus Strains Infecting Single Citrus Trees, Hani̇fe Genç

Turkish Journal of Agriculture and Forestry

Fifteen different biologically important citrus tristeza virus (CTV) isolates (B14, B15, B23, B31, B52, B57, T36, D9, D10, D11, D12, D15, D16, D20 and D32) were tested using strain-specific biotin-labeled oligonucleotide probes. Coat protein genes (CPGs) of the samples were amplified by PCR, and the products were hybridized with probes (direct PCR hybridization (DPH)) and sequenced. In the DPH, all samples having probe 0 reactions were infected with CTV. Some isolates giving more than one specific probe reaction showed that they may be infected by mixtures of different CTV strains. In order to investigate this, CPGs from individual bacterial colonies …

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Effects Of Different Tire Configurations On Tractor Performance, Sarp Korkut Sümer, Alaetti̇n Sabanci Jan 2005

Effects Of Different Tire Configurations On Tractor Performance, Sarp Korkut Sümer, Alaetti̇n Sabanci

Turkish Journal of Agriculture and Forestry

The effects of tire ply constructions (radial and bias) and tire arrangements (singles and duals on rear the axle) on tractor performance were evaluated for 2 gear levels on 2 different fields covered with wheat stubble and having different soil types, clay and sandy-loam. For this purpose, the tractor's overall efficiency, specific fuel consumption, and slip values were determined using parameters measured in the study. The results showed that the use of radial tires provided some advantages. For example, overall tractor efficiency with radial tires instead of bias tires increased by 3.44%, while specific fuel consumption decreased by 3.08% on …

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Fifth Year Performance Of Morphologically Graded Cedrus Libani Seedlings In The Central Anatolia Region Of Turkey, Akkin Semerci̇ Jan 2005

Fifth Year Performance Of Morphologically Graded Cedrus Libani Seedlings In The Central Anatolia Region Of Turkey, Akkin Semerci̇

Turkish Journal of Agriculture and Forestry

The effects of morphological characteristics on seedling performance were studied in Cedrus libani seedlings at 3 locations in the Central Anatolia region of Turkey. Some 2+0 seedlings were morphologically graded according to height and root collar diameter sizes. The seedlings were divided into 5 height categories and each height category was divided into small and large root collar diameter subcategories. The morphologically graded seedlings were planted at 3 locations. After 5 growing seasons, the mean survival of the seedlings planted in Ankara, Eskişehir and Konya locations was 84.4%, 77.9% and 54.7%, respectively. The mean height of seedlings planted in Ankara, …

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The Effects Of Joint Forms (Shape) And Dimensions On The Strengths Of Mortise And Tenon Joints, Ali̇ Naci̇ Tankut, Nurgül Tankut Jan 2005

The Effects Of Joint Forms (Shape) And Dimensions On The Strengths Of Mortise And Tenon Joints, Ali̇ Naci̇ Tankut, Nurgül Tankut

Turkish Journal of Agriculture and Forestry

Until recently, detailing of joints was largely a matter of tradition, based on trial and error methods. However, in the engineering design of furniture, it is necessary for designers to create joints with a specified strength. This study was undertaken accordingly, to obtain the strength of round tenon/round mortise, rectangular tenon/rectangular mortise and rectangular tenon/round mortise joints assembled under nominally identical conditions with different end configurations. In addition, each end configuration was compared at rail widths, each with 2 widths of tenon. The results showed that rectangular end mortise and tenons are about 15% stronger than both round end mortise …

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The Effect Of Crop Losses During Pre-Harvest And Harvest Periods On Production Costs In Tomato Production In The Ayaş And Nallıhan Districts Of Ankara Province, F. Füsun Tatlidi̇l, Taner Kiral, Erdemi̇r Gündoğmuş, Hali̇l Fi̇dan, Duygu Aktürk Jan 2005

The Effect Of Crop Losses During Pre-Harvest And Harvest Periods On Production Costs In Tomato Production In The Ayaş And Nallıhan Districts Of Ankara Province, F. Füsun Tatlidi̇l, Taner Kiral, Erdemi̇r Gündoğmuş, Hali̇l Fi̇dan, Duygu Aktürk

Turkish Journal of Agriculture and Forestry

The aim of this research was to analyze the impact on unit crop cost of crop losses that occur during the pre-harvest and harvest periods. It is understood today that crop losses occurring during these periods have an impact on crop cost and a negative effect on profit. The Ayaş and Nallıhan districts of Ankara province, where tomato production is carried out intensively, were selected as the research areas. Dwarf tomatoes are grown in the Ayaş district and indeterminate tomatoes in the Nallıhan district. A sample size of 74 for Ayaş and 34 for Nallıhan was calculated using a simple …

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An Abattoir Survey Of Liver And Lung Helminthic Infections In Local And Imported Sheep In Jordan, Anwar Maraqa, Zuhair Sami Amr, Lina Rifai, Walid Al-Melhim Jan 2005

An Abattoir Survey Of Liver And Lung Helminthic Infections In Local And Imported Sheep In Jordan, Anwar Maraqa, Zuhair Sami Amr, Lina Rifai, Walid Al-Melhim

Turkish Journal of Veterinary & Animal Sciences

The livers and lungs of 5596 sheep (443 local, 473 Romanian and 4680 Australian) slaughtered in Amman Central Abattoir during November-December 1999 were examined in routine meat inspection procedures for helminths. Dictyocaulus filaria, hydatid cyst, Fasciola hepatica and Dicrocoelium dendriticum were recovered from the examined sheep with variable prevalences. Dicrocoelium dendriticum is reported from the livers of imported sheep in Jordan for the first time.

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The Effect Of Oxytetracycline On Non-Specific Immune Response In Sea Bream (Sparus Aurata L. 1758), Ramazan Serezli̇, Haşmet Çağirgan, İbrahi̇m Okumuş, Süleyman Akhan, Fi̇kri̇ Balta Jan 2005

The Effect Of Oxytetracycline On Non-Specific Immune Response In Sea Bream (Sparus Aurata L. 1758), Ramazan Serezli̇, Haşmet Çağirgan, İbrahi̇m Okumuş, Süleyman Akhan, Fi̇kri̇ Balta

Turkish Journal of Veterinary & Animal Sciences

The aim of the present study was to evaluate the immunomodulatory effects of orally administered oxytetracycline HCl (OTC) of 75 mg/kg body weight for 10 days on the immune response in sea bream (Sparus aurata L. 1758) using the nitro blue tetrazolium (NBT) reduction test and erythrocyte and leucocyte counts. Administration of 75 mg/kg OTC for 10 days enhanced the non-specific immune response, and increased NBT (+) cell, total erythrocyte and leucocyte numbers in sea bream at 23 ± 1 ºC. The effect of OTC on the immune system lasted around 21 days after ceasing the administration and the parameters …

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Determination Of The Recruitment To Stock And Reproduction Period For Flounder (Platichthys Flesus Luscus Pallas, 1811) Along The Trabzon-Rize Coast, Eastern Black Sea, Erhan Çi̇loğlu Jan 2005

Determination Of The Recruitment To Stock And Reproduction Period For Flounder (Platichthys Flesus Luscus Pallas, 1811) Along The Trabzon-Rize Coast, Eastern Black Sea, Erhan Çi̇loğlu

Turkish Journal of Veterinary & Animal Sciences

The length and weight distribution of flounder (Platichthys flesus luscus Pallas, 1811) were 14.2-34.1 cm and 28.879-611.0 g, respectively. The samples were distributed between the 0 and VII age groups. Von Bertalanffy growth parameters for flounder were L_t = 41.241[1-e^{-0.161(t+3.240)}] for females, L_t= 33.567[1-e^{-0.181(t+3.525)}] for males and L_t = 40.577[1-e^{-0.142(t+3.105)}] for the sexes combined. Reproduction took place from December to March but peaked in December. Two recruitment periods were determined for flounder: the first was January to July, and the second August to November. The proportions of recruitment in the first and second periods were 68.13% and 31.87%, respectively.

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